diff --git a/library/dc-dc.dcm b/library/dc-dc.dcm
index 72329ee9..7fff7bef 100644
--- a/library/dc-dc.dcm
+++ b/library/dc-dc.dcm
@@ -979,6 +979,42 @@ K DC/DC converter CCD Bias Boost
 F http://cds.linear.com/docs/en/datasheet/3472f.pdf
 $ENDCMP
 #
+$CMP LT3755xMSE
+D DC/DC LED Controllers, MSOP-16. Hysteresis Open led Status pin
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
+$CMP LT3755xMSE-1
+D DC/DC LED Controllers, MSOP-16. Frequency Synchronisation
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
+$CMP LT3755xMSE-2
+D DC/DC LED Controllers, MSOP-16. Improved Open Led Status Pin
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
+$CMP LT3755xUD
+D DC/DC LED Controllers, QFN-16. Hysteresis Open led Status pin
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
+$CMP LT3755xUD-1
+D DC/DC LED Controllers, QFN-16. Frequency Synchronisation
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
+$CMP LT3755xUD-2
+D DC/DC LED Controllers, QFN-16. Improved Open led Status pin
+K Boost Buck Buck-Boost SEPIC Flyback
+F http://cds.linear.com/docs/en/datasheet/37551fd.pdf
+$ENDCMP
+#
 $CMP LT3757EMSE
 D Boost, flyback, SEPIC and inverting regulator (MSOP package)
 $ENDCMP
diff --git a/library/dc-dc.lib b/library/dc-dc.lib
index 680ca420..02399dd6 100644
--- a/library/dc-dc.lib
+++ b/library/dc-dc.lib
@@ -1366,6 +1366,136 @@ X GND 11 0 -500 100 U 50 50 1 1 W
 ENDDRAW
 ENDDEF
 #
+# LT3755xMSE
+#
+DEF LT3755xMSE U 0 40 Y Y 1 F N
+F0 "U" -550 750 50 H V C CNN
+F1 "LT3755xMSE" 350 750 50 H V C CNN
+F2 "Housings_SSOP:MSOP-16-1EP_3x4mm_Pitch0.5mm" 1000 -750 50 H I C CNN
+F3 "" -50 -1100 50 H I C CNN
+ALIAS LT3755xMSE-2
+$FPLIST
+ MSOP*3x4mm*Pitch0.5mm*
+$ENDFPLIST
+DRAW
+S -600 -700 600 700 0 1 10 f
+X PWMOUT 1 700 -500 100 L 50 50 1 1 O
+X FB 2 700 400 100 L 50 50 1 1 I
+X ISN 3 700 300 100 L 50 50 1 1 I
+X ISP 4 700 200 100 L 50 50 1 1 I
+X VC 5 700 -600 100 L 50 50 1 1 O
+X CTRL 6 -700 300 100 R 50 50 1 1 I
+X VREF 7 -700 400 100 R 50 50 1 1 O
+X PWM 8 -700 -300 100 R 50 50 1 1 I
+X ~OPENLED 9 -700 0 100 R 50 50 1 1 C
+X SS 10 -700 -500 100 R 50 50 1 1 I
+X RT 11 -700 -600 100 R 50 50 1 1 I
+X ~SHDN~/UVLO 12 -700 600 100 R 50 50 1 1 I
+X INTVCC 13 700 600 100 L 50 50 1 1 w
+X VIN 14 0 800 100 D 50 50 1 1 W
+X SENSE 15 700 -200 100 L 50 50 1 1 I
+X GATE 16 700 -100 100 L 50 50 1 1 O
+X GND 17 0 -800 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+# LT3755xMSE-1
+#
+DEF LT3755xMSE-1 U 0 40 Y Y 1 F N
+F0 "U" -550 750 50 H V C CNN
+F1 "LT3755xMSE-1" 350 750 50 H V C CNN
+F2 "Housings_SSOP:MSOP-16-1EP_3x4mm_Pitch0.5mm" 1000 -750 50 H I C CNN
+F3 "" -50 -1100 50 H I C CNN
+$FPLIST
+ MSOP*3x4mm*Pitch0.5mm*
+$ENDFPLIST
+DRAW
+S -600 -700 600 700 0 1 10 f
+X PWMOUT 1 700 -500 100 L 50 50 1 1 O
+X FB 2 700 400 100 L 50 50 1 1 I
+X ISN 3 700 300 100 L 50 50 1 1 I
+X ISP 4 700 200 100 L 50 50 1 1 I
+X VC 5 700 -600 100 L 50 50 1 1 O
+X CTRL 6 -700 300 100 R 50 50 1 1 I
+X VREF 7 -700 400 100 R 50 50 1 1 O
+X PWM 8 -700 -300 100 R 50 50 1 1 I
+X SYNC 9 -700 0 100 R 50 50 1 1 I
+X SS 10 -700 -500 100 R 50 50 1 1 I
+X RT 11 -700 -600 100 R 50 50 1 1 I
+X ~SHDN~/UVLO 12 -700 600 100 R 50 50 1 1 I
+X INTVCC 13 700 600 100 L 50 50 1 1 w
+X VIN 14 0 800 100 D 50 50 1 1 W
+X SENSE 15 700 -200 100 L 50 50 1 1 I
+X GATE 16 700 -100 100 L 50 50 1 1 O
+X GND 17 0 -800 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+# LT3755xUD
+#
+DEF LT3755xUD U 0 40 Y Y 1 F N
+F0 "U" -550 750 50 H V C CNN
+F1 "LT3755xUD" 350 750 50 H V C CNN
+F2 "Housings_DFN_QFN:QFN-16-1EP_3x3mm_Pitch0.5mm" 1050 -750 50 H I C CNN
+F3 "" -50 -1100 50 H I C CNN
+ALIAS LT3755xUD-2
+$FPLIST
+ QFN*3x3mm*Pitch0.5mm*
+$ENDFPLIST
+DRAW
+S -600 -700 600 700 0 1 10 f
+X VREF 1 -700 400 100 R 50 50 1 1 O
+X PWM 2 -700 -300 100 R 50 50 1 1 I
+X ~OPENLED 3 -700 0 100 R 50 50 1 1 I
+X SS 4 -700 -500 100 R 50 50 1 1 I
+X RT 5 -700 -600 100 R 50 50 1 1 I
+X ~SHDN~/UVLO 6 -700 600 100 R 50 50 1 1 I
+X INTVCC 7 700 600 100 L 50 50 1 1 w
+X VIN 8 0 800 100 D 50 50 1 1 W
+X SENSE 9 700 -200 100 L 50 50 1 1 I
+X GATE 10 700 -100 100 L 50 50 1 1 O
+X PWMOUT 11 700 -500 100 L 50 50 1 1 O
+X FB 12 700 400 100 L 50 50 1 1 I
+X ISN 13 700 300 100 L 50 50 1 1 I
+X ISP 14 700 200 100 L 50 50 1 1 I
+X VC 15 700 -600 100 L 50 50 1 1 O
+X CTRL 16 -700 300 100 R 50 50 1 1 I
+X GND 17 0 -800 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+# LT3755xUD-1
+#
+DEF LT3755xUD-1 U 0 40 Y Y 1 F N
+F0 "U" -550 750 50 H V C CNN
+F1 "LT3755xUD-1" 350 750 50 H V C CNN
+F2 "Housings_DFN_QFN:QFN-16-1EP_3x3mm_Pitch0.5mm" 1050 -750 50 H I C CNN
+F3 "" -50 -1100 50 H I C CNN
+$FPLIST
+ QFN*3x3mm*Pitch0.5mm*
+$ENDFPLIST
+DRAW
+S -600 -700 600 700 0 1 10 f
+X VREF 1 -700 400 100 R 50 50 1 1 O
+X PWM 2 -700 -300 100 R 50 50 1 1 I
+X SYNC 3 -700 0 100 R 50 50 1 1 I
+X SS 4 -700 -500 100 R 50 50 1 1 I
+X RT 5 -700 -600 100 R 50 50 1 1 I
+X SHDN/UVLO 6 -700 600 100 R 50 50 1 1 I
+X INTVCC 7 700 600 100 L 50 50 1 1 w
+X VIN 8 0 800 100 D 50 50 1 1 W
+X SENSE 9 700 -200 100 L 50 50 1 1 I
+X GATE 10 700 -100 100 L 50 50 1 1 O
+X PWMOUT 11 700 -500 100 L 50 50 1 1 O
+X FB 12 700 400 100 L 50 50 1 1 I
+X ISN 13 700 300 100 L 50 50 1 1 I
+X ISP 14 700 200 100 L 50 50 1 1 I
+X VC 15 700 -600 100 L 50 50 1 1 O
+X CTRL 16 -700 300 100 R 50 50 1 1 I
+X GND 17 0 -800 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 # LT3757EMSE
 #
 DEF LT3757EMSE U 0 30 Y Y 1 F N